Cattani-Lorente M Scherrer SS Ammann P Jobin M Wiskott HW 2011 Bars of Y-TZP ceramic for dental restorations were subjected to hydrothermal degradation via in vitro exposure to water steam at 140°C for 7 days. X-ray diffraction, atomic force microscopy and scanning electron microscopy techniques were applied to observe and quantify the tetragonal-monoclinic (t-m) phase transformation associated with the process. Nanoindentation was used to assess the ceramic's mechanical properties before and after hydrothermal degradation. Texture associated with martensitic t-m transformation was observed at the grain surface. The t-m transformation followed nucleation-and-growth kinetics, with predominance of the nucleation process. The transformation occurred within a layer of 6 μm below the surface. Mechanical properties deteriorated with hydrothermal degradation, resulting in a 30% reduction of Young's modulus and hardness. A strong correlation was found between the increasing monoclinic fraction and the decline in mechanical response. It was thus concluded that the emergence of the monoclinic phase and the associated microcracking were the most likely causes for the degradation of mechanical properties. https://sonar.ch/global/documents/89550 eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.actbio.2010.09.020 info:eu-repo/semantics/altIdentifier/pmid/20854937 Acta biomaterialia. - 2011 Cold Temperature Dental Porcelain Elastic Modulus Hardness Microscopy, Atomic Force Microscopy, Electron, Scanning Nanotechnology Phase Transition Spectrometry, Fluorescence Surface Properties X-Ray Diffraction Yttrium Zirconium Low temperature degradation of a Y-TZP dental ceramic. http://purl.org/coar/resource_type/c_6501